fix: Fix the NoSuchMethodError error that occurs when calling a post request without a request body when your project depends on OkHttp3.x

[hanpijun-buhanpi]

错误描述

当项目使用OkHttp3.x时调用了无需请求体的POST请求时，将会抛出NoSuchMethodError异常

重现bug的步骤

1. 构建配置
   RSAAutoCertificateConfig config = new RSAAutoCertificateConfig.Builder().build();
2. 构建服务
   GiftActivityService service = new GiftActivityService.Builder().config(config).build();
3. 新建请求
   TerminateActivityRequest request = new TerminateActivityRequest();
4. 设置参数
   request.setActivityId("1");
5. 发起请求
   TerminateActResponse response = service.terminateActivity(request);

预期行为

我期望它不会报错

导致错误的代码片段

public final class OkHttpClientAdapter extends AbstractHttpClient {
  // ...
  private RequestBody buildOkHttpRequestBody(
      com.wechat.pay.java.core.http.RequestBody wechatPayRequestBody) {
    if (wechatPayRequestBody == null) {
      // create an empty request body
      return RequestBody.create("", null); // 报错
    }
    // ...
  }
  //...
}

操作系统

Windows11

Java 版本

Java 17

wechatpay-java 版本

v0.2.17

其他信息

No response